1、R语言strsplit用于分割字符串

创建测试数据

> test <- "aa bb cc dd ee ff" ##创建测试数据> test[1] "aa bb cc dd ee ff"> class(test) ## 测试数据为字符[1] "character"

2、按照指定分隔符拆分字符串

> a <- strsplit(test,split = " ") ##制动分隔符为空格进行拆分数据> a[[1]][1] "aa" "bb" "cc" "dd" "ee" "ff"> class(a) ## 分割后的数据类型为列表[1] "list"> b <- strsplit(test,split = "") ## 分隔符设为空，则拆分每一个字符> b[[1]] [1] "a" "a" " " "b" "b" " " "c" "c" " " "d" "d" " " "e" "e" " " "f"[17] "f"> test <- "aa,bb,cc,dd,ee!ff!GG" ##重新创建测试数据> strsplit(test,split = ",") ##指定分隔符为","进行拆分[[1]][1] "aa" "bb" "cc" "dd" "ee!ff!GG"> strsplit(test,split = "!") ##指定分隔符为"!"进行拆分[[1]][1] "aa,bb,cc,dd,ee" "ff" "GG"> test <- "aa,bb,cc,dd,ee!ff!GG" ##重新创建测试数据> strsplit(test,split = ",") ##指定分隔符为","进行拆分[[1]][1] "aa" "bb" "cc" "dd" "ee!ff!GG"> strsplit(test,split = "!") ##指定分隔符为"!"进行拆分[[1]][1] "aa,bb,cc,dd,ee" "ff" "GG"> test <- "aa.bb.cc.dd.ee" ##同上> strsplit(test,split = ".")[[1]] [1] "" "" "" "" "" "" "" "" "" "" "" "" "" ""> strsplit(test,split = ".",fixed = T)[[1]][1] "aa" "bb" "cc" "dd" "ee"

3、指定输出结果为向量

> test <- "aa,bb,cc,dd,ee" ##生产测试数据> a <- strsplit(test,split = ",") > a[[1]][1] "aa" "bb" "cc" "dd" "ee"> class(a)[1] "list"> b <- unlist(strsplit(test,split = ",")) ## 加unlist函数> b[1] "aa" "bb" "cc" "dd" "ee"> class(b) [1] "character"

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